I would add a non-military economy, and make the game not strongly war based.
Something like:
-Multiple players
-Resources like oil, water, clean air etc. (which all players have access to and is shared.) For example if a player pollutes air, drains all oil from the oil reserves and dumps his waste to the river which you take your water from, you probably have a reason for war unless you can solve it through diplomacy
-You only need to defeat the enemys defense, not destroy him completely. Eg. Fill the streets with your army, and after a while youll get hold of all his factories etc (with reduced functionality for some time of course)

I would add a non-military economy, and make the game not war based.<br /><br />Something like:<br />-Multiple players<br />-Resources like oil, water, clean air etc. (which all players have access to and is shared.) For example if a player pollutes air, drains all oil from the oil reserves and dumps his waste to the river which you take your water from, you probably have a reason for war unless you can solve it through diplomacy<br />-You only need to defeat the enemys defense, not destroy him completely. Eg. Fill the streets with your army, and after a while youll get hold of all his factories etc (with reduced functionality for some time of course)<br />